The sky appears blue due to :

Correct option is A

The correct answer is (a) Scattering of light
Explanation
The sky appears blue because of the scattering of sunlight by the molecules and tiny particles in the Earth's atmosphere.
· Shorter wavelengths (blue light) are scattered more strongly than longer wavelengths (red light). This phenomenon is known as Rayleigh Scattering.
Additional information (other options)
· Diffraction of light: Bending of light around obstacles— not responsible for sky’s color.
· Reflection of light: Light bouncing off surfaces—not applicable here.
· Refraction of light: Bending of light as it passes through mediums—also not responsible.
Information Booster
· During sunrise and sunset, the sky appears red/orange because the blue light is scattered away and only longer wavelengths reach the observer.
· Rayleigh scattering is inversely proportional to the fourth power of wavelength, meaning short wavelengths scatter much more.